Press clutch



amount of useto replace certain parts.

Patented iipr., 27,A 1926.

.its stares er;

o Mange@ if t ' rases CLUTCH.

Application filedvnNovem'ber Clutches; and Idoherebydeclare that 'the' following is a full, clear, and exact rdescriptionlthereof.

invention jrelatesl broadly yto new. and useful improvements in Clutches, l and v,more particularlyto ppunch Vdevicesffor use on punch presses and-similar press machinery. AAs press clutches v.are.iat-present con# structed, `most of thema-re relatively short lived .and it is necessary yatter a limited Obviously Whenua relatively rapidlyinoving elementlcomes in con-tact with a stationary element, the force otimpact is greatv and unless the contactingpartsvare of requisite strength, theivealier parts will be mutilated or displaced to av certain extent. Consequently-When the clutch Vdog engaging elef ments strike the clutchV dog in` punch presses or similar--press1nachinery,. there isy a .ten-

.dency of thefornierto-be-broken onsheared oli. y

.Therefore -it sri'sflthe; :primary object of this invention to .provide an arrangement. .Wherebythe dil-'ferent contacting parts ,of afpressA clutch may be-suitably reinforced,V so as to eliminate the foregoing diiilculty. l

A further. object A`or they invention `to provide` simple .and Vetlicient arrangement for selectively tripping a clutch dog tomove `it out of operativeengagement with tthe clutch dog engagingmembers, -and -in this connection-it. is a'fsubsidiary object to. lock` .the clutch dog-inth-isposition While lthe ditferent parts of the press are being adjusted,l-etc., or While new dies lare being placed in ythe press head.

it is still another Iobjectof the invention toi provide a simply constructed clutch ol` this general character, theY parts of which can bevreadily' assembled or replaced, and vwhichwvill be extremely ethcient iii-'operation. y

VWith thesefgeneral objectsin vientmy invention resides in the novel features ,ot construction, combination and arrangement of parts, Which yWill be` hereinafter -more particularly Adescribed and claimed.

In .the accompanying drawings 2a, l lage. seriaitnafeoascs.

Figure 1 represents a transversesectional view of the co-operating parts of. a v'clutch constructed'inaccordance With .the .inven tion, the section being taken substantiallyon theplafne oi the line 1 1 oitFigni-e2iA i Figure 2 is a longitudinal sectionalvieiv" taken approximately Y n upon the planeof ,the line 2-2 ot Figure 1.

rFigure 3 is anV additional transverse sec tion on .the planeet the line '3 3 ofV Figure 2. y

ln thepreferred. embodiment ot theinvention as shown inthe several iiguresoffthe drawings, the reference character 1 denotes the hubv portion of a drive Wheel vvhich it is desi-red'to lock at predetermined times. to a driven shat't 2, thev portion of .Which-:adjacent the Wheel issupported inabearing 3.

,Vhen vthe drive Wheel .is .not .locked Itothe shaft 2,V it freely rotates thereon While said shaft .remains stationary. ,Thedrive wheel 1 `is continuously rotated byany suitable driviinql mechanism and the shafft-2 isecon- -nectedwith other mechanism which isfdesigned `to Abe intermittently actuated. Y

The hub-.oic the-.drive Wheel surrounding the bearing opening thereinwhich receives .the shaft 2 is provided ivi-th a boss 4l, andthe same ,has a socket. 5 in ivhichaeollar or flange 6,' formed on the shait't2 isdisposed. The boss 4 iniaddition to thesoclzet 5 isalso provided with a plurality. offhead receiving' recesses the inner portions of ivhichopen .through theirvall ot lsaid sockete so as 1to positionthecontact faces 8 ot'. the -clutch heads@ therein vSaid ,heads 9 are :detachably, yet securely mounted yin said'recesses 7 Ibyineansot shanks lOonivhich the .heads are .integrally formed together with threaded stems 11 and nuts 12. As shown .most clearly Yin Figure2, the recesses 7 coincide With shank receiving bores 13 v`formed 'through the' hub l axiallyv thereof, said stemsv11 being extended through .openings in lthe bottom oi said Chores. .Thus vby threading' thefnuts. 12 onsaid'stems 1 1; the heads =9 can :be rigidly Vseatediu, therecesses 7. u

Theliange 6 is provided with adog receiving" pocket 14 vin Whicha clutch vdog 15is pivotallyA mounted at `one end by `iulcrum pin 1G. The ypivot end of the .dog is arcuate as is also .the adjacent end of the pocket, the Wall of both of these parts being concentric with the tulcrum pin axis, so that the CII end of the pocket, while permitting` the dog to move orbitally therein, will form a stop surface against which the end of the doe' may abut when the same is struck by one or the heads 9. Y

The free end of the dog 15 has a stop lip 17 which is adapted to engage with one wall of the pocket 1-1 to limit movement of said dog away from the axis of the shaft 2, it being normally urged in such direction by the provision of an evpansible spring 18 located between the inner wall of the pocket and the adjacent wall of the same. The clutch dog 15 has a contact face 19 for engagement by the contact faces S of the several heads 9, the surface of all of these several faces being formed on an arc concentric with the axis of the fulcrum pin 16 so that the clutch dog can be readily shifted from the position shown in Figure 1 into the pocket 1l. Furthermore a structure of this character permits the force exerted by the drive wheel to be transmitted to the shaft 2 tangentially thereof, this being also noticeable from the last referred to figure.

Although the dog 15 is adapted to be housed within the pocket 14e, it is provided with a trip lug 2O which is always disposed exteriorly of the pocket 1%. lVhen the dog 15 is active and arranged as shown in Figure 1, the trip lug 2O is positioned substantially beyond the periphery of the fla-ngc 6, but when the same is located within the pocker 14, said lug is seated in a notch 21 formed in said flange 6. This lug is designed to be engaged with a trip plate 22 carried by a rocking trip arm 23.

Said trip arm 23 is fixed to a rock shaft 24 and located between rock shaft bearings 25. These bearings 25 are formed on the ends of bearing ears 26 which are carried by a clamp colla-r 2T secured about the bearing 3 adjacent the boss el. The bearings 25 are connected by a semi-cylindrical bridge plate 28 receiving the cylindrical rock shaft embracing portion 29 of the trip arm 23, whereas the ends of the clamp collar 2?, which is split, are secured together and the collar clamped about bearing 3 by means of a clamp screw 30. It is to be noted from reference to the drawings that the clamping collar 27 may be adjustably secured about the bearing in any desired position to determine t-he exact point at which the release mechanism will operate.

The trip plate is movable to either one of two positions by rocking the shaft 2l, in one of said positions the plate 22 being in the path of movement of the trip lug, and in the other position being out of said path of movement and disposed in a recess 31 formed in the collar 2T. `When said trip plate is in the path of movement of the trip lug 20, it is impossible for the drive wheel to be locked to the shaft- 2, therefore means is provided to prevent rocking of the trip arm under certain conditions. ln other words said trip arm has a locking lug 32, while the bridge plate 2S carries a screw bearing 351 in which a locking screw 3l is threaded. As shown in Figure 2 by moving up the screw 311, its end may be brought into engagement with the lug 32 and the trip arm held against rocking so that the trip plate 22 will be retained in the pat-h of movement of the trip hw 20.

then the apparatus heretofore described is in use, suitable'means is provided for rocking the shaft 211 as is customary in press ma` chinery, but it will be appreciated that upon each rocking of said shaft the trip plate 22 will be shifted out of the path of movement of the trip lug 20, thus permitting the clutch dog to be forced outwardly by the spring 18 into the path of travel of the several heads 9. Thus as the rotating drive wheel brings one of the heads into engagement with the contact face 19 of the clutch dog, the shaft 2 will be locked to said drive wheel and rotated therewith so long as the clutch dog is permitted to remain in its active position as shown in Figure 1. Normally, however, as soon as the trip plate 22 is moved out ot the pathof the trip lug 20 and the clutch dog 15 is rotated by the drive wheel beyond the former, it is permitted to return to the position as shown in Figure 2 so as to again be located to trip the clutch dog when the same is brought into proximity thereto. In other words the shaft 2 is permitted only one revolution after being locked to the drive wheel before the same is unlocked and the wheel permitted to rotate freely.

I claim:

1. A. clutch comprising a driving element, a driven element, a socketed boss on one of the elements, a movable clutch dog carried by the other element and disposed in the socket on said boss, a trip lug on the dog and projecting from said socket, a clutch dog engaging member carried by the boss and having a contact face within said socket, a trip selectively movable into and out of the path of movement of the trip lug and means directly engaging said trip for locking the trip in the path of movement of the trip lug.

2. A clutch comprising a driving element, a driven element, a soeketed boss on one of the elements, a movable clutch dog carried by the other element and disposed in the socket on said boss, a trip lug on the dog and projecting from said socket, a clutch dog engaging member carried by the boss and having a contact face within said socket, a trip selectively movable into and out of the path of movement of the trip lug and means directly engaging said trip for locking the trip in the path of movement of the trip lug.

A clutch comprising a bearing, a driven element journaled in said bearing, a driving the driven element, a clutch dog engagingv member carried by the driving element7 a trip lupal` projecting from Said clutch clog, a, Collar Surrounding seid bearing, means for clamping said collar tightly around said bearing. in any adjusted position, a trip pivotally carried by said collar, and means for selectively moving the trip into and out of the path of travel of the trip lug.

In testimony that I claim the foregoing I have hereunto set my hand at Milwaukee, in the county of Milwaukee and State of THnoDoR ZETTERLUND. 

